Definitions
What is Electrical Energy?
The energy of moving electrons
What is ONE example of a conductor material?
metals (copper, silver, aluminum, gold)
What equation is: P=(V)(I)
Electric Power equation
True or False: An electric current exist even if an electric circuit is broken.
False
What is the resistance of a circuit that draws 0.12 amperes with 6 volts applied?
50 ohms
The push/pull potential that e- feel when they are in an electric field is called ________?
Voltage
Name 2 types of voltage sources:
1) batteries
2) outlets
3) generaters
etc
What is the controlled flow of electrons?
Current Electricity
True or False: The bigger the electrical device, the more power it uses.
False
If your TV 150 amps and a voltage of 2500 volts, how many watts will the power rating be?
375,000
(150 amps)(2500 volts) = 375,000
What is it called when objects gain or lose electrons and become charged?
Static Electricity
Name at least 2 things that resistance depends on:
* Temperature
* Wire Thickness
* Wire Length
* Material
True or False: An open circuit has electron flow.
False!
An open circuit has NO electron flow!!
What happens to the electrons in a wire when an electric current is produced?
Electrons begin to move/flow
If a current of 0.6amps flows through a radio that is using 9volts, how much resistance is the radio creating in the circuit?
15ohms
What is it called when e- are never created or destroyed, they just move from object to object?
Conservation of Charge
What are TWO examples of an insulator material?
Plastic, Silicone, Rubber, Glass, Oil, Dry Wood
True or False: A short circuit is caused when electrons find and follow a more resistant pathway in the circuit.
False!
This is caused when electrons find and follow a less resistant pathway in the circuit.
How do fuses and circuit breakers work?
They break open the circuit and stop the flow of electrons if the current is too high
Toni's Alexa Echo requires 7A of current from a 55V outlet. How much power does it use?
385 watts
What explains the relationship between voltage, current and resistance?
Ohm's Law
What four components do you need to create an electric circuit?
* voltage source
* conductive pathway
* device
* switch
What are two things that you could do to a circuit if you want to increase the current in that circuit?
* increase voltage
* decrease resistance
What happens to the electrons in the atoms of an object when the object becomes positively charged?
Atoms lose their electrons
A snow plow transforms 27,000W of electrical power into mechanical form. If the motor's operating voltage is 750V, how much current does it "draw" when operating at full load (full power output)?
36 amps
27,000W / 750V = 36A